package org.example.controller;

import lombok.extern.slf4j.Slf4j;
import org.example.common.R;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.web.bind.annotation.*;
import org.springframework.web.multipart.MultipartFile;

import javax.servlet.Filter;
import javax.servlet.Servlet;
import javax.servlet.ServletOutputStream;
import javax.servlet.http.HttpServletResponse;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.IOException;
import java.util.UUID;

@Slf4j
@RestController
@RequestMapping("/common")
public class CommonController {
    @Value("${reggie.path}")
    private String basePath;
    @PostMapping ("/upload")
    public R<String> upload(MultipartFile file)
    {
        log.info(file.toString());
        log.info(basePath);
        String originalFilename =   file.getOriginalFilename();
        String suffix = originalFilename.substring(originalFilename.lastIndexOf("."));


        String fileName = UUID.randomUUID().toString()+ suffix;
        File dir =new File(basePath);
        if(!dir.exists())
        {
            dir.mkdir();
        }
        try {
            file.transferTo(new File(basePath+ fileName));
        }catch (IOException e)
        {
            e.printStackTrace();
        }
        return R.success(fileName);
    }
    @GetMapping("/download")
    public  void download(String name, HttpServletResponse response)
    {
        try {
            FileInputStream fileInputStream =new FileInputStream(new File(basePath+name));
            ServletOutputStream outputStream =response.getOutputStream();

            response.setContentType("image/jpeg");

            int len = 0;
            byte [] bytes=new byte[1024];
            while ((len = fileInputStream.read(bytes))!=-1){
                outputStream.write(bytes,0,len);
                outputStream.flush();
            }

            outputStream.close();
            fileInputStream.close();
        } catch (Exception e) {
            throw new RuntimeException(e);
        }

    }
}
